Question

@Transactional(propagation = Propagation.REQUIRED)
public Users updateUser(Users user);

实施是：

     @Override
        public Users updateUser(Users user) {
            Session session = this.sessionFactory.openSession();
            Users updateUser = (Users) session.merge(user);
            session.saveOrUpdate(updateUser);
            return updateUser;
        }

如果我使用session.beginTransaction().commit();，则只会更新我的数据。但我正在使用@Transactional，我知道维护会话和交易。任何人都可以告诉我为什么需要手动提交提交吗？

更新

调度-servlet.xml中

 <?xml version='1.0' encoding='UTF-8' ?>
<!-- was: <?xml version="1.0" encoding="UTF-8"?> -->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
    <!--scan the given package for controllers--> 
    <context:component-scan base-package="com.edumongoose.controllers"/> 
    <context:component-scan base-package="com.edumongoose.compilers"/> 
    <!--support for @Controller and @RequestMapping-->
    <mvc:annotation-driven />
    <!--support for general annotations such as @Required, @Autowired, @PostConstruct, and so on.-->
    <context:annotation-config/>

     <bean id="viewResolver"
          class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.tiles2.TilesView"/>
    </bean>

    <bean id="tilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
        <property name="definitions">
            <list>
                <value>/WEB-INF/tiles.xml</value>
            </list>
        </property>
    </bean>
<!--    <bean id="transactionManager"
          class="org.springframework.orm.hibernate4.HibernateTransactionManager" 
          p:sessionFactory-ref="sessionFactory">
    </bean>

     <tx:annotation-driven transaction-manager="transactionManager" />-->

</beans>

的applicationContext.xml

  <?xml version='1.0' encoding='UTF-8' ?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-3.0.xsd">

     <!--scan the given package for repository--> 
    <context:component-scan base-package="com.edumongoose.dao"/> 
    <context:component-scan base-package="com.edumongoose.daoimpl"/> 

    <bean id="transactionManager"
          class="org.springframework.orm.hibernate4.HibernateTransactionManager" 
          p:sessionFactory-ref="sessionFactory">
    </bean>

     <!--tx annotation driven scans registered spring beans for @Transactional-->
    <tx:annotation-driven transaction-manager="transactionManager" />

    <!--support for @Controller and @RequestMapping-->
    <mvc:annotation-driven/>
    <!--support for general annotations such as @Required, @Autowired, @PostConstruct, and so on.-->
    <context:annotation-config/>
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" >
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/contest" /> 
        <property name="username" value="root" />
        <property name="password" value=""/> 
        <property name="connection.characterEncoding" value = "utf-8"/>
    </bean>

    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="packagesToScan" value="com.edumongoose.entity"/>
        <property name="hibernateProperties">
            <props>
                <prop key="c3p0.minPoolSize">15</prop>
                <prop key="c3p0.maxPoolSize">1000</prop>
                <prop key="c3p0.timeout">5000</prop>
                <prop key="c3p0.max_statement">500</prop>
                <prop key="c3p0.testConnectionOnCheckout">true</prop>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
    </bean>


</beans>

的web.xml

 <?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:applicationContext*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>*.htm</url-pattern>
    </servlet-mapping>

    <session-config>
        <session-timeout>
            15
        </session-timeout>
    </session-config>

    <error-page>
        <error-code>404</error-code>
        <location>/WEB-INF/jsp/pagenotfound.jsp</location>
    </error-page>

    <error-page>
        <error-code>500</error-code>
        <location>/WEB-INF/jsp/500exception.jsp</location>
    </error-page>

    <welcome-file-list>
        <welcome-file>redirect.jsp</welcome-file>
    </welcome-file-list>
</web-app>

Tiles.xml

<definition name="admintemplate" template="/WEB-INF/jsp/layout/admin/admintemplate.jsp">
    <put-attribute name="admintop" value="/WEB-INF/jsp/layout/admin/admintop.jsp" />  
    <put-attribute name="adminleft" value="/WEB-INF/jsp/layout/admin/adminleft.jsp" />       
    <put-attribute name="adminbody" value="" />
    <put-attribute name="adminbottom" value="/WEB-INF/jsp/layout/admin/adminbottom.jsp" />
</definition>

<definition name="landingtemplate" template="/WEB-INF/jsp/layout/landing/landingtemplate.jsp">
    <put-attribute name="title" value="Contest | Home"/>
    <put-attribute name="landingtop" value="/WEB-INF/jsp/layout/landing/landingtop.jsp" />  
    <put-attribute name="landingbody" value="" />
    <put-attribute name="landingbottom" value="/WEB-INF/jsp/layout/landing/landingbottom.jsp" />
</definition>

<definition name="errorlayout" template="/WEB-INF/jsp/layout/errorlayout.jsp">
    <put-attribute name="title" value="Page Not Found" type="string" />
    <put-attribute name="errorbody" value="" />
</definition>

<definition name="home" extends="landingtemplate">

    <put-attribute name="landingbody" value="/WEB-INF/jsp/homepage.jsp" />
</definition>  

<definition name="signin" extends="landingtemplate">
    <put-attribute name="landingbody" value="/WEB-INF/jsp/signin.jsp" />
</definition>  

<definition name="signup" extends="landingtemplate">
    <put-attribute name="landingbody" value="/WEB-INF/jsp/signup.jsp" />
</definition>  

<definition name="dashboard" extends="usertemplate">
    <put-attribute name="body" value="/WEB-INF/jsp/dashboard.jsp" />
</definition>  

<definition name="solveproblem" extends="usertemplate">
    <put-attribute name="body" value="/WEB-INF/jsp/solveproblem.jsp" />
</definition>  

<definition name="listing" extends="usertemplate">
    <put-attribute name="body" value="/WEB-INF/jsp/listing.jsp" />
</definition>  

<definition name="admindashboard" extends="admintemplate">
    <put-attribute name="adminbody" value="/WEB-INF/jsp/admindashboard.jsp" />
</definition>  

<definition name="uploadproblem" extends="admintemplate">
    <put-attribute name="adminbody" value="/WEB-INF/jsp/uploadproblem.jsp" />
</definition>  

<definition name="problemlisting" extends="admintemplate">
    <put-attribute name="adminbody" value="/WEB-INF/jsp/adminproblemlisting.jsp" />
</definition>

@transactional（propagation = Propagation.REQUIRED）这是否自动提交

0 个答案: